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圆展开---探究圆周率
Author:
陈宜红
GeoGebra
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双心四边形
折扣
异形操场
撒针估算面积实验
百分數及其應用
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waaachen
角速度概念
比例中的定值問題(一)
魔术师的地毯
第一次尝试
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Equilateral Triangles
Statistics
Power Functions
Matrices
Surface